Bonobos, one of humanity’s closest relatives, can tell when a human doesn’t know something and steps in to help — a cognitive ability never before identified in nonhuman apes, a study found.

A lot of human society requires what’s called a “theory of mind”—the ability to infer the mental state of another person and adjust our actions based on what we expect they know and are thinking. We ...

Jane Goodall’s research at Gombe Stream National Park revolutionized our understanding of chimpanzee intelligence. In 1960, she observed a chimp named David Greybeard stripping leaves from twigs to ...

A series of hide-and-seek experiments with a bonobo named Kanzi shows for the first time that apes can mentally keep track of multiple familiar humans at once, even when they are out of sight. Kanzi ...

As a great ape, the chimpanzee possesses intelligence superior to most animals on the planet. A chimp’s genes determine about half of its intelligence, while environmental factors make up the other ...

We all know that chimpanzees and other animals are extremely intelligent and deeply emotional. And now a recent and extremely detailed study shows just how smart chimpanzees can be and that there are ...